I agree with you, but don't forget the entire section on 10mm revolvers. If you like the ballistics out of a 5" 1911, check out a 6" or 6.5" Smith Model 610, GP-100 or Uberti Cattleman. I routinely knock down my metal swingers at 20 yards with mine.
As for the sub-gun market, it's been tried and didn't fair too well. Fast, repeated shock like that against a bolt face caused lots of equipment failures. I'm looking at you HK.